What is a Halogen Lamp?
• A halogen bulb is an ordinary incandescent bulb, with a few modifications. The fill gas includes traces of a halogen, often but not necessarily iodine. The purpose of this halogen is to return evaporated tungsten to the filament. • As tungsten evaporates from the filament, it usually condenses on the inner surface of the bulb. The halogen is chemically reactive, and combines with this tungsten deposit on the glass to produce tungsten halides, which evaporate fairly easily. When the tungsten halide reaches the filament, the intense heat of the filament causes the halide to break down, releasing tungsten back to the filament. • This process, known as the halogen cycle, extends the life of the filament somewhat. Problems with uneven filament evaporation and uneven deposition of tungsten onto the filament by the halogen cycle do occur, which limits the ability of the halogen cycle to prolong the life of the bulb. However, the halogen cycle keeps the inner surface of the bulb clean. This
Halogen bulbs contain a high pressure tungsten filament and are filled with halogen gasses. The halogen gasses allow the filament to operate at higher efficacies than regular incandescent lamps. Halogen lamps provide brighter, whiter light with better color characteristics, longer service and improved energy efficiency. Will handling a halogen bulb shorten its life? Yes, if you handle the bulb with your bare hands. The oils from your skin will be transferred to the glass of the bulb. The halogen bulb gets very hot and the oils from your skin will create a ‘hot spot’ and burn the bulb out faster. If you accidentally touch the glass part of the bulb, simply wipe it off with some alcohol to remove the fingerprints. Do not try this with a bulb that is hot, it may burn you or crack, wait until it cools down. What are Watts? Watts are a unit of electrical power. Lamps are rated in watts to indicate the rate at which they consume energy. What are lumens? Lumens are a measurement of overall li
A halogen lamp is designed to house a halogen bulb. A halogen bulb is a light bulb that is manufactured in a different way in order to provide a very intense light. Similar to other light bulbs, the halogen bulb consists of a filament that is produced from tungsten. However, with a halogen bulb, rather than the bulb being filled with argon gas, the halogen bulb contains halogen gas. The halogen gas facilitates the removal of the carbon that is deposited on the inside of the bulb. This carbon is created when the tungsten filament heats up. The removal of the carbon, by the halogen gas, redistributes the carbon back onto the filter which in turn allows for burning at a higher temperature. Ultimately, this entire process provides a whiter and brighter light. Therefore, because a halogen bulb is different than a normal bulb, a special lamp is needed that will accommodate this bulb. A halogen lamp contains socket housing that will accept the unique base of the halogen bulb. Also, because of
The halogen lamp first entered the U.S. market in 1957. Halogen bulbs were a refinement of regular light bulbs, offering up to 20 percent more energy efficiency, a longer life and better light quality. The light from halogen lamps looks whiter and brighter than regular lamps, because it has higher color temperatures and its output consists of more blues and greens. Both the halogen lamp and the incandescent light contain a filament made from tungsten. But the halogen is encased in a much smaller quartz envelope that contains halogen gas, which combines with the tungsten atoms as it evaporates and redeposits them on the filament. This recycling process is a main reason why the halogen filament lasts longer. One downside of the halogen lamp, as compared to the regular lamp, is that halogen light bulbs get hot, dangerously hot. Even though these high temperatures are essential to the operation of halogen lamps (they result from a smaller envelope surface which is closer to the light bulb’
A. A halogen lamp is a tungsten filament lamp that is filled with a small amount of the halogen gas bromine. When the lamp is energized the evaporating tungsten molecules combine with halogen vapor to form tungsten bromine. This tungsten bromine will not condense on the lamp wall when the wall temperature is between 250° and 325° C. The result being a lamp envelope that does not blacken during life.
